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Articles by D. Bilalis
Total Records ( 4 ) for D. Bilalis
  D. Bilalis , N. Sidiras , E. Vavoulidou and A. Konstantas
  Earthworms influence soil fertility, and their population is known to be influenced by fertilization. The objective of this study is to characterize the abundance of earthworms under three different kinds of rotation-crops (Rotation: cereals-legumes for green manure-cotton), three tillage systems (Conventional Tillage CT, Minimum Tillage MT, & No-Tillage NT) and fertilization (NP: inorganic and FYM: farmyard manure-organic). Significantly higher populations of earthworms were found under the legumes and NT system in contrast to the lowest abundance determined under the cotton and CT system. Earthworm populations benefited more from organic fertilization than from NP. Our study showed that the most important factors for earthworm abundance are the macropores and Corg under Mediterranean conditions. No-till management considerably influenced the improvement of the physical and chemical soil properties and increased the earthworm abundance.
  A. Karkanis , D. Bilalis and A. Efthimiadou
  Field experiments were conducted to determine the effects of drip irrigation and sprinkler irrigation and green manure on morphological and physiological characteristics of tobacco. The experiment was laid out in a split plot design with four replicates, two main plots (drip and sprinkler irrigation) and three sub-plots (vetch as green manure, red clover as green manure and control (without fertilization)). Green manures increased leaves width and length, diameter of stem and roots and the most significant impact was when vetch was applied to soil. Physiological characteristics were significantly influenced by the green manures. The lowest stomatal conductance and photosynthetic rate were found in control plots. Drip irrigation was characterised by a smaller amount of water applied to the soil. However, drip irrigation increased the length of leaves. The roots and stem diameter were not affected by the irrigation systems. Also, 86 days after transplanting, the lowest stomatal conductance and photosynthetic rate were found in plots irrigated with sprinkler system.
  A. Karkanis , D. Bilalis and A. Efthimiadou
  In field trials conducted in central Greece during two growing seasons, effects of irrigation system and fertilization on the host-parasite association tobacco-Orobanche ramosa were quantified. The experiment was designed as split plot design with four replicates, two main plots (drip and sprinkler irrigation) and three sub-plots (vetch as green manure, red clover as green manure and control (without fertilization)). Drip irrigation was the only treatment that significantly reduced broomrape infestation throughout the growing season. Also, drip irrigation reduced Orobanche dry weight by 70-76%. Finally, the use of drip irrigation system appears to be a promising cultural practice in the management of Orobanche ramosa in tobacco.
  P. Bouchagier , A. Efthimiadou , A. Katsileros , D. Bilalis and P. Efthimiadis
  A two-year (2002/03 and 2003/04) experiment was conducted in the research site of the Agricultural University of Athens, Greece, to study the effects of Bermudagrass (Cynodon dactylon L.) in several agronomic and physiological characteristics of cotton (Gossypium hirsutum L.). Effects on cotton depended on timing of weed influence. Bermudagrass reduced stomatal aperture, chlorophyll content and chlorophyll fluorescence of cotton plants. Growth of cotton was also significantly reduced. Maximum reduction was 41.7% for stem height, 62.0% for root dry matter, 61.9% for stem dry matter and 34.7% for stem diameter. Stomatal resistance, chlorophyll content and chlorophyll fluorescence are proposed as suitable indicators that in addition to agronomic characteristics can reliably be used to measure adverse effects caused to cotton due to Bermudagrass interference.
 
 
 
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